Stone breaker and crusher



(NoModeL) 2 Sheets-Sheet '1'.

' P. W. GATES.

STONE BREAKER AND GRUSHER.

Patented Sept. 16, 188 4,

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(No Model.) I 2 SheetsSheet 2.

P. W. GATES.

STONE BREAKER AND GRUSHER.

No. 305,172. Patented Sept. 16, 1884.

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IJ' ITED STATES PHILETUS W. GATES, OF CHICAGO, ILLINOIS.

STONE BREAKER AND CRUSHER.

SPECIFICATION forming part of Letters Patent No. 305,172, dated September 16, 1884.

Application filed January 2, 1883. Renewed January 31,1884. (N0 model.) Patented in England May 7, 1881, No. 1,995; in France May 7, 1881. No.142,733; in Belgium May 9, 1881, No. 54,578, and in Canada July 26, 1881, No.13,178.-

.To all whom it may concern:

Be it known that I, PHILETUs W. Gnrns, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Stone Breakers and Crushers, of which the following is aspecification.

My invention relates to an improvement in the stone-breaker for which I filed an applica tion for a patent on the 17th of February, 1879, which was granted February 13, 1883, No. 272,233, my present invention being a division of the subject-matter thereof, and which was patented to me in England May 7, 1881, No.

1,995; in France May 7, 1881, No. 142,733;

in Belgium May 9, 1881, No. 54,578, and in Canada July 26, 1881, No. 13,178.

My invention consists in a novel combination of the leverage break-pin and fasteningscrew with the power-shaft, a bevel-wheel on said shaft, provided with lugs for breaking the pin, and with the bevel-wheel, of the gyrating crusher-shaft of the stone-breaker. This combination is such that the brealcpin is unsupported between the shaft or collar and the breaking-lugs, and is broken by a leverage power derived from the temporary interruption or stoppage of the gearing caused by a foreign irreducible substance coming in con tact with the crushing-surface. By my present invention the toothed gearwheel will instantly become loose upon the power-shaft by the breaking of the safety-pin, which occurs when an extraordinary strain comes upon the machinery, and thus the machinery will be stopped from operating and saved from damage, while the power-shaft may continue to to a base-plate, J, upon which is formed an oil step-box, j, open at top, closed at bottom, and provided with a stepbloclgj, and an adjusting-screw, f, as shown. The frame is provided with suitable openings in its circumference for the escape of crushed material and 5 the insertion of the gearing; and it also is provided with a diaphragm shielding-chute, a, having an aperture, a, surrounded by a bearing, a a flaring concave with suitable lining, M, and an open cap portion with bear- 6o ing-box L, into which latter a sliding bearing for a ball, k, of the crusher-shaft is fitted. Vithin the oil step-box an eccentric revolving bearing, i, fitted and keyed within a hub, i,

of a bevelwheel, I, is suspended, as shown.

fitted loosely in the revolving eccentric bear- 7 5 ing i of the step-boxy, being supported upon the step-block j and adjusting-screwj as shown.

Around the shaft K and upon the bearing (6 a loose dust-excluding collar, It, is make to rest and fit, dust-tight, as shown.

The main driving-shaftB carries a drivingpnlley, C, a iiy-wheel, D, and a bevel gearwheel, H, which latter gears with the bevelwheel I of the eccentric bearing i, and gives rotary motion to said bearing and a gyrating motion to the shaft and crusher-head. This motion of the shaft causes the crusher-head to crush or break the stone within the concave with an impacting force, while the resistance 0 of the stone, during the breaking operation, causes the shaft and its crushinghead to gradually turn backward about its own axis, the loose journal end of the shaft and the ball at the upper end permitting this action to take 5 place.

The machine thus far described is similar to the one described I in my aforesaidpatent,

The ball 7; has its support in the 7o and therefore is not claimed herein, except so far as its parts are employed in connection with the improvement which I shall now proceed to describe. In orderto save the described stone breaker or crusher, or machines of analogous construction for crushing stone, from destruction, when a crow-bar or other such irreducible obstacle is presented to the crusher-head, I have devised a novel combination of means whereby the toothed gearwheel of the driving-shaft, instead of the driving-pulley and fly-wheel, as in my aforesaid patent, can be made to become loose on the shaft.

By referring to the drawings it will be seen that the tooth ed wheel H is loosely fitted upon' equal to the full working resistance of the ma chinery, and is intended to break when the strain exceeds that capacity.

On the face of the wheel H two lugs, 72 are provided, and between theselugs the protruding extension or end of the pin G is held, as The pulley O and the flywheel D are shown.

keyed fast to the shaft, so that, in case the pin G breaks, the pulley G, fly-wheel D, and shaft B will continue to revolve, while the toothed wheel H and other parts of the machine remain at rest. This mode of applying the safety-pin gives a long leverage in the pin itself, between its supported ends, and by this means the pin will break readily midway of itslength, between its supported ends, when said ends are pressed against by a force greater than it is intended the pin shall be capable of resisting; and hence the pin can be more readily broken in two transversely than can a pin which has its whole length or body supported.

This pin thus applied can be readily withdrawn and a new one substituted without removing the gearing.

It is found in practice that the safety breakpin may be made of either metal or wood.

IVhat I claim as myinvention, and desire to secure by Letters Patent, is

The combination of the break-pin G and setscrew gwith the shaft B, bevel-wheel H, provided with lugs h, bevel-wheel I, and crushershaft K, substantially as and for the purpose described.

PHILETUS w. earns.

W'itncsses:

J. L. FARGO, RYnnsoN D. Glrrns. 

